# A001280 (b-file synthesized from sequence entry)
8 11
9 309
10 5805
11 95575
12 1516785
13 24206055
14 396475975
15 6733084365
16 119143997490
17 2201649739310
18 42514526708766
19 857750898213594
20 18068801884373310
21 397038791150060850
22 9090755207499817170
23 216635190303090215910